Patents Represented by Attorney Ralph F. Harper

Find this attorney in the Justia Lawyer Directory

  • Method and apparatus for controlling a drive in a machine tool
    Patent number: 5883482
    Abstract: A method and apparatus for controlling the output to a drive for moving a workpiece and/or tool along a defined path in a machine tool. The drive output can be modified according to a periodic controlling variable or a periodic disturbance variable. The defined path of the workpiece is divided into equidistant subdivisions and a control deviation corresponding to each subdivision of the defined path is determined and stored. A control variable is derived from the control deviation and utilized to control the drive output.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: March 16, 1999
    Assignee: The Gleason Works
    Inventors: Johannes Hocht, Bernhard Leicht